A man is looking for a place to sit in a crowded university library and asks a girl: "Do you mind if I sit beside you?"
The girl replies in a loud voice: "I DON'T WANT TO SPEND THE NIGHT WITH YOU!"
All the other students started staring at the man and he is so embarrassed
he moves to another table.
After a couple of minutes, the girl walked quietly to his table and says with a laugh:
"I'm studying psychology, so I know what a man is thinking. I guess you felt embarrassed, right?"
The man replies in a loud voice: "£500 FOR ONE NIGHT? . . . I CAN'T AFFORD THAT!"
All the students now start looking at the girl, and the man whispers:
"I'm studying law, so I know how to screw people."